mass-transfer-controlled electrolyte rate constant

https://doi.org/10.1351/goldbook.M03755
In controlled-potential coulometry and related techniques, the empirically evaluated constant of proportionality defined by the equation sB=1cB dcBdt where cB is the
bulk concentration
of the substance B, and dcBdt is the rate of change of that concentration, resulting from the consumption of B by reduction or
oxidation
at the
working electrode
.
Source:
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1501 [Terms] [Paper]